Submission #446517

#	Time	Username	Problem	Language	Result	Execution time	Memory
446517		ritul_kr_singh	Easter Eggs (info1cup17_eastereggs)	C++17	100 / 100	25 ms	360 KiB

eastereggs

#include <bits/stdc++.h>
#include "grader.h"
using namespace std;
 
vector<int> g[513];
int t[512], dfsTimer;
 
void dfs(int u, int p){
	t[dfsTimer++] = u;
	for(int v : g[u]) if(v != p) dfs(v, u);
}
 
int findEgg (int n, vector <pair<int, int>> e){
	for(int i=0; i<n; ++i) g[i+1].clear();
	dfsTimer = 0;
	
	for(auto &[u, v] : e){
		g[u].push_back(v);
		g[v].push_back(u);
	}
 
	dfs(1, 1);
 
	int x = 0;
	for(int y=n > 16 ? 512 : 16; y/=2; ){
		if(x + y <= n){
			vector<int> q(x+y);
			for(int j=0; j<x+y; ++j) q[j] = t[j];
			x += y * !query(q);
		}
	}
 
	return t[x];
}

• Subtask 1: 40 / 40
• Subtask 2: 40 / 40
• Subtask 3: 20 / 20